JP4374757B2 - Resin window panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin window panel, and more particularly to a resin window panel used for an automobile sunroof or the like.
[0002]
[Prior art]
As a window panel used for an automobile sunroof or the like, a window panel made of inorganic glass or resin is used. Each window panel requires a plate thickness for ensuring the required surface rigidity, and the plate thickness is constant over the entire window panel. Here, the surface rigidity is determined by the distortion of the portion where the load is applied when a predetermined load perpendicular to the panel is applied to the panel with the peripheral edge of the window panel supported. The smaller the value, the higher the surface rigidity.
FIG. 3 shows a sunroof mounting structure using a resin window panel having a constant thickness.
The resin window panel 1 is a substantially rectangular plate-shaped body made of a transparent resin material and having a constant thickness. A reinforcing member 2 is disposed along the peripheral edge 1 a of the resin window panel 1, and the reinforcing member 2 is fixed to the resin window panel 1 with an adhesive 4. The peripheral edge of the reinforcing member 2 is bent into an L shape to form a flange 2a, and a weather strip 3 is fitted into the flange 2a. The resin window panel 1 is slidably supported by a vehicle body (not shown) via a reinforcing member 2 at the peripheral edge 1a.
[0003]
[Problems to be solved by the invention]
However, in the surface rigidity of the resin window panel 1 having a constant plate thickness, the surface rigidity of the peripheral portion is higher than necessary with respect to the surface rigidity of the central portion. That is, when a predetermined vertical load is applied to the central portion of the resin window panel 1, the distortion of the resin window panel 1 is large. When the same load is applied to the peripheral portion, the peripheral portion 1a becomes closer to the peripheral portion than the central portion. It is running low.
For this reason, in the resin-made window panel 1 with a constant plate thickness, a predetermined plate thickness for ensuring the surface rigidity of the central portion is determined, and as a result, a surface rigidity higher than necessary is obtained in the peripheral portion. It is a plate thickness.
Therefore, the resin window panel 1 uses more material than necessary in the peripheral portion, and there is a problem that the cost is high and the weight is large.
On the other hand, when the occupant views the outside of the vehicle through the resin window panel 1, the resin window panel 1 must provide a view without distortion. Therefore, if the thickness of a part of the resin window panel 1 is increased locally or rapidly, the field of view is distorted at the portion where the thickness changes suddenly.
[0004]
The present invention has been made to solve such a problem, and an object of the present invention is to provide a resin window panel that can be manufactured with a small amount of material, is inexpensive, lightweight, and has a distortion-free view.
[0005]
[Means for Solving the Problems]
The resin-made window panel according to the present invention is made of a resin having an attachment support part that is partitioned at a peripheral part and is attached to and supported by the vehicle body, and an effective visual field part that is a see-through part partitioned inside the attachment support part. in the window panel, the effective field of view portion, and the peripheral portion has a plate thickness and a thicker central portion than the peripheral portion, both the surface and the back surface of the effective field of view portion, provided with a smooth curved surface which is curved in the same direction, The curvature radius of the back surface is larger than the curvature radius of the front surface .
Et al is, the thickness of the effective field of view portion, toward the periphery from the center, both the surface and the direction which are curved in the back surface of the effective field of view portion may vary at a constant rate.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1A, a resin window panel 10 according to the present invention is a substantially rectangular plate-like body made of a transparent resin material, for example, polycarbonate. The thickness of the resin window panel 10 is thickest at the central portion 10c, and the peripheral portion 10b is continuously thinner from the central portion 10c toward the peripheral portion 10a. The two-dot chain lines shown in FIG. 1 (a) are iso-thick lines that connect portions having the same plate thickness, and continuously at a constant rate in each direction from the central portion 10c toward the peripheral portion 10a. The plate thickness is thin.
Further, as shown in FIGS. 1B and 1C, the front surface 10d side and the back surface 10e side of the resin window panel 10 both form a smooth curved surface curved in the same direction. By making the curvature radius R2 of the back surface 10e larger than the curvature radius R1 of the front surface 10d, the thickness of the central portion 10c is the largest, and the thickness of the peripheral portion 10b gradually decreases from the central portion 10c toward the peripheral portion 10a. Form a shape.
[0007]
FIG. 2 shows a sunroof mounting structure using the resin window panel 10 according to the present invention.
In the figure, the reinforcing member 2 is disposed along the peripheral edge 10 a of the resin window panel 10 and is fixed to the resin window panel 10 by the adhesive 4. The peripheral edge of the reinforcing member 2 is bent into an L shape to form a flange 2a, and a weather strip 3 is fitted into the flange 2a. The resin window panel 10 is slidably supported by a vehicle body (not shown) via the reinforcing member 2 at the peripheral edge portion 10a. In other words, the peripheral edge portion 10 a of the resin window panel 10 is provided with an attachment support portion 10 g that is attached to and supported by the vehicle body via the reinforcing member 2. In addition, an effective visual field portion 10f including a see-through portion in which the visual field outside the vehicle can be confirmed without being covered with the reinforcing member 2 is formed inside the mounting support portion 10g.
[0008]
Next, the operation of the resin window panel 10 according to the present invention will be described with reference to FIGS.
The resin window panel 10 according to the present invention shown by a solid line in FIG. 1 (d) has the highest surface rigidity compared to the conventional resin window panel 1 shown by a broken line having the same size and a constant plate thickness. The lower central portion 10c is formed to have the same distortion. On the other hand, the distortion of the peripheral part of the resin window panel 10 is larger than that of the conventional resin window panel 1 because the plate thickness is thin in the peripheral part.
FIG. 1E shows a comparison of the plate thickness between the resin window panel 10 according to the present invention and the conventional resin window panel 1.
The plate | board thickness of the resin-made window panels 10 shown as a continuous line in FIG.1 (e) becomes thin gradually toward the peripheral part 10a from the center part 10c. The plate thickness of the central portion is the plate thickness of the conventional resin window panel 1 indicated by a broken line, that is, in the case where the plate thickness is constant so that the distortion amount of the central portion does not exceed the strain limit due to the thinning. It is thicker than the virtual plate thickness required to maintain the predetermined surface rigidity, and the plate thickness of the peripheral portion is thin. Since the plate thickness can be reduced at the peripheral portion that occupies a larger area than the central portion, the resin window can be manufactured with less material than the conventional resin window panel 1 having a constant plate thickness, and is inexpensive and lightweight. Panel 10 is obtained.
[0009]
In this way, by increasing the thickness of the central part where the surface rigidity is the lowest, and by continuously reducing the thickness toward the peripheral part where the surface rigidity is relatively high, the required surface rigidity is ensured. , Material can be reduced, cost reduction and weight reduction can be achieved.
Further, in the effective visual field portion of the resin window panel 10, since the thickness is gradually changed without suddenly changing, the visual field is not distorted.
[0010]
In this embodiment, the case where the resin window panel 10 according to the present invention is applied to a sunroof of an automobile has been described. However, the present invention is not limited to this, and the present invention is not limited to the front window, rear window, and side window of an automobile. It can also be applied.
The surface 10d of the resin window panel 10 is not formed by a curved surface having a single radius of curvature, and the entire surface 10d may be formed by smoothly connecting curved surfaces having a number of curvature radii. Similarly, the back surface 10e of the resin window panel 10 is not formed by a curved surface having a single radius of curvature, and the entire back surface 10e may be formed by smoothly connecting curved surfaces having a number of curvature radii.
[0011]
【The invention's effect】
According to this invention, both the front and back surfaces of the effective visual field portion have smooth curved surfaces curved in the same direction, and the plate thickness of the effective visual field portion is continuously reduced from the central portion toward the peripheral portion. A resin window panel that can be manufactured with less material than a resin window panel having a constant thickness and that is inexpensive and lightweight, and that provides a view without distortion can be obtained.
Et al is, the thickness of the effective field of view portion, toward the peripheral portion from the central portion, can therefore be varied at the surface and a constant rate in each direction which is curved in the back surface of the effective field of view portion, even more distortion of vision less .
[Brief description of the drawings]
1A and 1B are views showing a resin window panel according to an embodiment of the present invention, where FIG. 1A is a plan view, FIG. 1B is a cross-sectional view taken along line Ib-Ib, and FIG. 1C is Ic-Ic; Sectional drawing along the line, (d) is a distortion graph comparing a conventional resin window panel, and (e) is a thickness graph comparing a conventional resin window panel.
FIG. 2 is a cross-sectional view showing a structure of a sunroof using a resin window panel according to an embodiment.
FIG. 3 is a cross-sectional view showing the structure of a sunroof using a conventional resin window panel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Resin window panel, 10a ... Peripheral part, 10b ... Peripheral part, 10c ... Central part, 10d ... Front surface, 10e ... Back surface, 10f ... Effective visual field part, 10g ... Installation support part.

Claims (2)

In a resin window panel having a mounting support part that is partitioned into a peripheral part and attached to and supported by the vehicle body, and an effective visual field part that includes a see-through part partitioned inside the mounting support part,
The effective field of view is
A peripheral portion, and a thicker central portion than the plate thickness of the peripheral portion,
A resin window panel characterized in that both the front surface and the back surface of the effective visual field part have smooth curved surfaces curved in the same direction, and the curvature radius of the back surface is larger than the curvature radius of the surface . Thickness of the effective field of view portion, toward the peripheral portion from the central portion, a resin window panel according to claim 1 that changes at the surface and a constant rate in each direction which is curved in the back surface of the effective field of view portion .

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